1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a33c380928893b7dfec87d17e6b5e3cb94ea0a93108c9424e12d9470a37a33. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32d0ee9a-8b43-47e9-bf5c-56cef012af7c.json and https://artists.proofprofile.net/proofs/artist/32d0ee9a-8b43-47e9-bf5c-56cef012af7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Traviata, Act I: Brindisi - "Libiamo ne' lieti calici" (Instrumental Version)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9166d106b6bf020af045b7c2c31e655621096fff62d45fe97aa9b45eb128ef09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US5541404100.
The Magic Flute, K. 620, Act I: Papageno's Aria - "Der Vogelfänger bin ich ja" (Instrumental Version)
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Soprano Love Arias: 50 Must-Have Opera Classics
The History of Classical Era Music (100 Famous Songs)
Grieg, E.: From Holberg's Time / Sibelius, J.: Karelia Suite / Finlandia / Valse Triste / Suite Champetre
Classical Masterpieces of the Millennium
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100 Must-Have History of Classical Music
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100 Must-Have Amour Romantic Love Song Classics
100 Must-Have Valentine's Day Love Song Classics
Classic á la Carte: International Dinner Party - Classical Music for Dining and Entertaining
String Quintet in E Major, Op. 11 No. 5, G. 275: III. Minuetto "The Celebrated Minuet"
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The Four Seasons - Concerto No. 4 in F Minor, Op. 8, RV 297 "Winter": II. Largo
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La Traviata, Act I: Libiamo ne' lieti calici (Brindisi)
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1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Nabucco, Act III: Chorus of the Hebrew Slaves (Instrumental Version)
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Gianni Schicchi: Lauretta's Aria - "O Mio Babbino Caro" (Instrumental Version)
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La Traviata, Act I: Brindisi (Instrumental Version)
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Tannhäuser, WWV 70, Act II: Entry of the Guests (Instrumental Version)
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Rigoletto, Act I: Gilda's Aria - "Caro Nome" (Instrumental Version)
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Turandot, Act III: Calaf's Aria - "Nessun Dorma" (Instrumental Version)
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La Traviata, Act II: Germont's Aria - "Di Provenza" (Instrumental Version)
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Madama Butterfly, Act II: Butterfly's Aria - "Un bel di vedremo" (Instrumental Version)
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La Bohème, Act I: Rodolfo's Aria - "Che gelida manina" (Instrumental Version)
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Gioachino Rossini: Selected Opera Overtures
The Darkside of Classical Music: Dark, Scary & Haunting Classics
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Христина Ангелакова: Арии из руски опери
Anna Tomowa-Sintow: Arias from Operas by Verdi
Verdi, Bizet, Gounod: Chorus from Operas
Верди - Вагнер - Гуно - Вебер: Хорове из опери
Rachmaninoff: Symphonic Dances, Op. 45 - The Rock, Op. 7
Рахманинов: История старой цыган из оперы Алеко
Dmitri Shostakovich: Symphony No. 12 in D Minor, Op. 112 The Year 1917
Верди - Вагнер - Хренников - Шапорин: Избрани произведения
Opera Arias - Mozart, W. A. / Bellini, V. / Verdi, G. / Rossini, G. / Gounod, C. / Massenet, J. / Puccini, G. / Schmidt, F. / Wagner, R.
Melodies From 1001 Nights - Mozart, W. A. / Gluck, C. W. / Beethoven, L. Van / Cornelius, P. / Mussorgsky, M. / Verdi, G. / Bizet, G.
Aria of Philip II (from Don Carlos, Act IV) (1867, rev.1884)
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Chorus of the Hebrew Slaves (from Nabucco, Act III) (1842)
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Credo in un Dio Crudele (from Otello, Act II) (1887)
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Scene and Aria from La Traviata, Act I (1853)
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Anvil Chorus from Il Trovatore, Act II (1853)
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Willow Song & Ave Maria (from Otello, Act IV)
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100 Must-Have Composers of Classical Music
The Bird Seller: Introduction and Waltzes
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Hungarian Rhapsody No. 2 in C-Sharp Minor, S. 244
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The History of Romantic Era Music (100 Famous Songs)